Gas pumping station in garage

The gas powered car refueled in the own garage from the gas line makes this
device from Citroen possible.

If one gives to the bivalent gasoline/gas vehicles thus a costly tank station, why does the C4 HDI Hybrid not get an simple battery charger, so that one can refuel with the electricity of his own photovoltaic roof?

Oil is imported in Europe from politically unstable regions. Since the Ukraine incident we know that also gas comes from politically unstable regions. However, electricity can be generated in the own house by a roof with photovoltaic.